.main {
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
}

.main .title-box {
    width: 100%;
    height: 182px;
    margin-bottom: 33px;
    background-color: #d62300;
}

.main .title-box .title-banner {
    width: 1180px;
    height: 182px;
    margin: 0 auto;
    background-repeat: no-repeat;
    background-position: center center;
}

/* 导航栏 */
.main .title-nav {
    width: 100%;
    margin: 0 auto;
}

/* 一级导航栏 */
.main .title-nav .top-nav-box {
    margin: 0 auto;
}
.top-nav-box ul.top-nav {
    height: 60px;
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    position: relative;
}

.top-nav-box ul.top-nav li {
    height: 60px;
    line-height: 60px;
    margin: 0 7px;
    padding: 0 35px;
    border-radius: 15px;
    font-size: 28px;
    text-align: center;
    background: white;
    cursor: pointer;
}

.top-nav-box ul.top-nav li.active:nth-child(1)::after {
    width: 0;
    height: 0;
    border: 15px solid transparent;
    border-bottom-color: white;
    bottom: -20px;
    left: 385px;
    content: "";
    display: block;
    z-index: 1000;
    position: absolute;
}

.top-nav-box ul.top-nav li.active {
    background: #d62300;
}

.top-nav-box ul.top-nav li.active a {
    color: white;
}

/* 二级导航栏 */
.main .title-nav .bottom-nav-box {
    width: 100%;
    background-color: white;
    position: relative;
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.5);
}

.bottom-nav-box ol.bottom-nav {
    height: 60px;
    display: flex;
    justify-content: center;
}

.bottom-nav-box ol.bottom-nav li {
    height: 60px;
    line-height: 60px;
    padding: 0 35px;
    border-radius: 15px;
    font-size: 28px;
    text-align: center;
    background: white;
    cursor: pointer;
}

.bottom-nav-box ol.bottom-nav li a:hover {
    color: #d62300;
}

.bottom-nav-box ol.bottom-nav li.active a {
    color: #d62300;
}

/* 主要内容 */
.main .main-content {
    width: 100%;
    height: 100%;
    /* padding-top: 142px; */
    box-sizing: border-box;
}

.main .main-content>img {
    width: 100%;
    min-width: 1180px;
    height: auto;
    display: block;
}

.main .main-content .img-item {
    width: 100%;
    min-width: 1180px;
}

.main .main-content .img-item>img {
    width: 100%;
    min-width: 1180px;
    height: auto;
    display: block;
}

/* 年份表 */
.main-content .img-item ul.year-box {
    width: 50%;
    position: absolute;
    left: 15%;
    top: 29%;
}

.main-content .img-item ul.year-box li {
    display: flex;
    margin-bottom: 7.15%;
    position: relative;
}

.main-content .img-item ul.year-box li img {
    width: 46.5%;
    opacity: 0.4;
    cursor: pointer;
}

.main-content .img-item ul.year-box li p {
    font-size: 20px;
    position: absolute;
    display: none;
}
.main-content .img-item ul.year-box li:nth-child(1) p {
    left: 60%;
}
.main-content .img-item ul.year-box li:nth-child(2) p {
    left: 50%;
}
.main-content .img-item ul.year-box li:nth-child(3) p {
    left: 42%;
}
.main-content .img-item ul.year-box li:nth-child(4) p {
    left: 36%;
}
.main-content .img-item ul.year-box li:nth-child(5) p {
    left: 31%;
}
.main-content .img-item ul.year-box li:nth-child(6) p {
    left: 28%;
}

.main-content .img-item ul.year-box li.active img {
    opacity: 1;
}

.main-content .img-item ul.year-box li.active p {
    display: block;
}

/* 定位图片 */
.main .main-content .img-item-1 {
    margin-top: 142px;
    position: relative;
}

.main .main-content .img-item-1 .img-box {
    width: 50%;
    position: absolute;
    right: -12%;
    top: 25.5%;
}

.main .main-content .img-item-1 .img-box img {
    width: 100%;
}

/* 视频控件 */
.main .main-content .img-item-1 {
    position: relative;
}

.main .main-content .img-item-1 .vd-box {
    width: 75%;
    position: absolute;
    left: 12.25%;
    bottom: 3%;
}

.main .main-content .img-item-1 .vd-box video {
    width: 100%;
}

/* 轮播图 */
.main-content .img-item-2 {
    width: 100%;
    position: relative;
}

.main-content .img-item-2 ul.crown {
    width: 100%;
    position: absolute;
    top: 0;
}

.main-content .img-item-2 ul.crown li {
    width: 100%;
    min-width: 1220px;
    position: absolute;
    display: none;
}

.main-content .img-item-2 ul.crown li.active {
    min-width: 1220px;
    display: block;
}

.main-content .img-item-2 ul.crown li img {
    width: 100%;
    min-width: 1220px;
}

.main-content .img-item-2 .arrow {
    width: 42.5%;
    left: 12%;
    top: 30%;
    position: absolute;
    display: flex;
    justify-content: space-between;
}

.main-content .img-item-2 .arrow .arrow-left {
    width: 8.8%;
    min-height: 58px;
    top: 32%;
    left: 12%;
    background-color: transparent;
    background-image: url(../img/trained/hg_icon_left.png);
    background-size: cover;
    background-position: center center;
    cursor: pointer;
    z-index: 1000;
}

.main-content .img-item-2 .arrow-right {
    width: 8.8%;
    min-height: 58px;
    top: 32%;
    left: 52%;
    background-color: transparent;
    background-image: url(../img/trained/hg_icon_right.png);
    background-size: cover;
    background-position: center center;
    cursor: pointer;
}

/* 返回顶部 */
.main .back-box {
    width: 70px;
    height: 70px;
    position: fixed;
    right: 19.68%;
    bottom: 25%;
    border-radius: 50%;
    display: none;
}

.main .back-box .back {
    width: 100%;
    height: 100%;
    background-image: url(../img/chosen/backtop.png);
    z-index: 1000;
    cursor: pointer;
}